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Query: UMLS:C0033774 (pruritus)
 14,546 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Ketotifen, benzocycloheptathiophene, (Zaditen) an orally active, anti-allergic and anti-asthmatic drug in a dose of 1 mg twice daily was given from 2 to 20 months in 20 selected patients with food allergy (FA) or food intolerance (FI). Sixteen children and four adults of which ten had atopic dermatitis (AD), six urticaria or/and angiooedema (two of which with oropharynx pruritus, oedema of the lips and anaphylactic shock), two asthma, and two gastrointestinal disorders. Food allergy was proved by clinical history, exclusion diet positive challenge test, skin prick tests (SPT) total IgE (PRIST) and specific IgE (RAST). Gastrointestinal permeability was measured in 5 out of 20 patients using mannitol and lactulose as probe molecules on three occasions: (1) by ingestion of the markers alone, (2) with concomitant ingestion of the offending food(s), and (3) with previous administration of ketotifen (2 mg) six hours before ingestion of markers and offending food. In all five individuals, food ingestion resulted in a significant rise of lactulose: mannitol urinary ratio and previous administration of ketotifen resulted in a normalization of the mannitol:lactulose urinary ratio. Patients with urticaria and/or angiooedema, gastrointestinal symptoms, asthma, and oropharynx pruritus with oedema of the lips were completely protected. In patients with AD, 70% were greatly improved or improved but 30% remained the same. It is our impression that ketotifen offers a new therapeutic dimension and therapy in FA.
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PMID:Ketotifen in prevention and therapy of food allergy. 368 73

Twenty-six children with atopic dermatitis and markedly elevated serum IgE concentrations were evaluated for clinical evidence of hypersensitivity to foods with double-blind placebo-controlled food challenges. Selection of foods for challenges was based on positive prick skin tests (greater than 3 mm wheal) or a convincing history. At least one positive skin test to a food antigen was found in 24/26 patients. A total of 111 double-blind placebo-controlled challenges were performed in these children after suspect foods were eliminated from their diets for 10 to 14 days. There were 23 positive challenges in 15 children, 21 of which manifested as cutaneous symptoms, primarily pruritus and an erythematous macular and/or maculopapular rash involving 5% (or greater) of the body surface. In all, 14 children (54%) developed cutaneous symptoms after food challenges. All symptoms occurred within 10 min to 2 hr of challenge; nasal symptoms, mild wheezing, and gastrointestinal symptoms were seen in some children. No symptoms occurred in 104 placebo challenges. There were 86/111 clinically insignificant positive skin tests (77%) and three false-negative skin tests. These studies demonstrate that in some children with atopic dermatitis, immediate food hypersensitivity can provoke cutaneous pruritus and erythema, which leads to scratching and subsequent eczematoid lesions.
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PMID:Role of immediate food hypersensitivity in the pathogenesis of atopic dermatitis. 684 27

Pruritus is a common complaint associated with equine dermatoses. Self-mutilation results in alopecia, excoriations, scaling, and crusting; the aesthetic appearance of the horse is often ruined and the horse may be unfit for riding or showing. This article specifically addresses those pruritic dermatoses caused by allergies, including food allergy/intolerance, atopy and contact allergy, as well as by two ectoparasites, stick-tight fleas and rhabditic mange. The clinical signs, diagnostic tests, and treatment recommendations are discussed for each disorder. Insect hypersensitivity and pruritus associated with the other more common ectoparasites are covered in depth elsewhere in this issue.
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PMID:Overview of equine pruritus. 763 58

This paper reviews food allergy and intolerance in dogs and cats. Adverse reactions to ingested food components can affect many systems and can produce signs involving the skin, gastrointestinal tract, respiratory tract and central nervous system, and these clinical signs are reviewed. Most basic food ingredients have the potential to induce an allergic response, although most reactions are caused by proteins. In particular, dogs and cats can become sensitive to cow's milk, beef, fish or cereal. Food allergy and intolerance is rare in dogs and cats, although the incidence in practice is difficult to establish. Clinical signs are quite variable, depending on the individual response, although the major clinical sign is pruritus. Diagnosis can be difficult, as there is no single test available to help the clinician to confirm or refute the presence of food sensitivity. Diagnosis is based on dietary investigation in the form of elimination diets and test meals. Elimination diets for dogs include lamb, chicken, rabbit, horse meat and fish as sources of protein, with rice or potatoes. Successful elimination diets for cats include lamb, chicken, rabbit or venison, with rice. Improvement in clinical signs while on the elimination diet is suggestive of food allergy. The diagnosis should be confirmed by feeding the original diet, with the development of clinical signs within 7 to 14 days of feeding.
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PMID:Diagnosis and management of food allergy and intolerance in dogs and cats. 784 79

A diagnosis of food allergy was made in eighteen dogs after they were fed on a hypoallergenic diet of lambs meat and rice. The skin complaints returned after the dogs were challenged with the original food. A commercial hypoallergenic diet was given once the skin complaints had disappeared after refeeding of the lamb and rice diet. Six of the eighteen dogs developed skin complaints (pruritus, scaly skin, and erythema) on the commercial diet.
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PMID:[Prospective study of a commercial hypoallergenic diet in 18 dogs with food allergy]. 797 45

A total of 122 infants and children up to age 17 (69 males and 53 females) who were referred for food allergy to the Pediatric Allergy and Clinical Immunology Unit were evaluated by complete history, emphasizing the implicated foods, clinical presentation and involvement of various organ systems, physical examination, and prick skin tests to food allergens. Fourteen infants with a history of egg white allergy and positive skin tests to egg white also underwent skin tests (prick and intradermal in 1:100 dilution) to measles-mumps-rubella (MMR) vaccine; 35 children under 3 years old had 41 oral challenges with the suspected foods; and 9 children over 3 years old had 12 oral challenges with the suspected foods. We found that cow milk/humanized milk formula, egg white, soybean, and peanut are the main allergenic foods in the pediatric population. Thirteen children had 13 positive oral challenges: 12 to cow milk/humanized milk formula and one to egg white. Symptoms reproduced by oral challenges included urticarial and erythematous rash, conjunctival itching, angioedema, abdominal pain, vomiting, diarrhea, and rhinorrhea. No anaphylactic shock was reported. Negative skin test has an excellent predictive accuracy for negative oral challenge with the suspected food in children > 3 years old. The negative predictive accuracy of cow milk skin test in children < 3 years was 73%. Positive skin test is not a good predictor of a clinical reaction to food. Oral food challenge performed cautiously in a medical setting is the "gold standard" for diagnosis. MMR vaccine can be safely administered to infants with egg white allergy after skin tests with the vaccine are performed.
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PMID:Food allergy in infants and children: clinical evaluation and management. 800 79

Severe facial pruritus in a cat was caused by food hypersensitivity to lamb. The cat had been fed an exclusive diet of lamb for 2 years after it had been diagnosed to have food hypersensitivity to fish. Signs, including erythema, alopecia, and excoriations of the head and neck, were poorly responsive to corticosteroid administration, but resolved within a few weeks after removal of the suspected allergen.
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PMID:Food hypersensitivity to lamb in a cat. 783 48

Three hundred and twenty-three individuals with self-reported food allergy were recruited by media advertisements. Questionnaire information was collected on all respondents. Chocolate (57%), milk (47%), wheat (36%) and food additives (35%) were the most frequently implicated foods. The most frequently reported symptoms were itching (43%), skin rash (43%) and tiredness (43%). Food avoidance was the most common form of food allergy diagnosis (33%) with only 8% of respondents reporting food challenge in food allergy diagnosis. Self-diagnosis was reported by 34% of respondents with 29% and 24% reporting diagnosis by a general practitioner or a homeopath, respectively. Twenty-four per cent of respondents 'always' avoided and a further 57% 'nearly always' avoided the implicated food(s). A group of 38 adults with self-reported 'milk allergy' was selected for further study. Dietary assessments, using the dietary history method, were carried out on this subgroup and on age-, sex- and occupation-matched controls. The results of the dietary assessments revealed that the 'milk allergy' group had significantly higher intakes of fibre, beta-carotene, vitamin C, vitamin E, iron and folic acid (P < 0.05) and significantly lower intakes of calcium (P < 0.002) in comparison to controls. Eighteen per cent of the group used milk alternatives. Thirty-four per cent of the 'milk allergy' group took calcium-containing supplements. Even after calcium supplementation, the mean calcium intake of those who completely avoided milk was unacceptably low (441 mg/d).
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PMID:Calcium intakes in individuals on diets for the management of cows' milk allergy: a case control study. 824 25

The diagnosis of food allergy was confirmed in 51 dogs while the responsiveness to a 60-day home-cooked restricted dietary trial (elimination-diet trial) was evaluated. The primary clinical sign of allergy detected and evaluated in all dogs was persistent and nonseasonally pruritic skin disease. The duration of time between starting the elimination-diet trial and remission of clinical signs was recorded. Dogs were then reexposed to diets that had been fed before testing, and the duration of time before pruritus recurred was recorded. The elapsed time during which dogs were being fed an elimination diet before remission of clinical signs was 1 to 3 weeks in 13 dogs, 4 to 6 weeks in 25 dogs, 7 to 8 weeks in 10 dogs, and 9 to 10 weeks in 3 dogs. Findings indicated that the recommendation of a 3-week elimination-diet trial for diagnosis of food allergy was adequate for only 25% of the dogs. It is recommended that test diets be fed for at least 10 weeks before a food allergy is ruled out.
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PMID:Diagnosis of food allergy in dogs. 840 85

Immunologically mediated reactions to foods are responsible for up to 10% of all allergic syndromes in dogs and cats. Skin lesions (pruritus, erythema and papules) represent the main manifestation (70 to 80%) compared to only 10 to 15% incidence of gastrointestinal signs in combination with skin problems or alone. Diarrhea, vomiting, low appetite, chronic weight loss, abdominal pain and lethargy are the most common signs involved in gastrointestinal food allergy. There exists no breed or sex predilection in dogs or cats; signs may occur at any time during life time. The immunological nature of the disease can only be guessed at from anamnestic and clinical features and must be verified by presence of lymphocytes, plasma cells, mast cells and eosinophilic granulocytes in histological specimens. At this time, the responsible allergen can only be identified in a restriction diet trial based on food which the animal has not been fed before, given exclusively for at least four weeks to the pet. Changing from one brand of commercial diet to another is not recommended. The diagnosis is conclusively proven by reproducing the symptoms by feeding the original diet after the elimination of signs on the new diet. The pet can then be fed on a commercial diet (or home-made food) without the offending allergen(s).
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PMID:[Feed allergy in dogs and cats--not only a gastrointestinal problem]. 847 Jan 6


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